US 11,869,414 B2
Pixel circuit and display device including the same
Keunwoo Kim, Seongnam-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Feb. 11, 2022, as Appl. No. 17/669,887.
Claims priority of application No. 10-2021-0055650 (KR), filed on Apr. 29, 2021.
Prior Publication US 2022/0351673 A1, Nov. 3, 2022
Int. Cl. G09G 3/3233 (2016.01); G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2310/0256 (2013.01); G09G 2320/0257 (2013.01); G09G 2320/043 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A pixel circuit comprising:
a first transistor including a first gate terminal, a first source terminal electrically connected to a first node, a first drain terminal electrically connected to a light emitting diode, and a back-gate terminal, wherein a first voltage which decreases over time is applied to the back-gate terminal;
a second transistor including a second gate terminal which receives a gate signal, a second source terminal which receives a data voltage, and a second drain terminal electrically connected to the first node; and
a global transistor including a global gate terminal which receives a second voltage that has a negative polarity, a global source terminal which receives a third voltage that has a positive polarity, and a global drain terminal electrically connected to the back-gate terminal,
wherein the global transistor is a single gate transistor.